$("input,select,textarea").click(function() {
	$(this).focus()
});
//对null值和undefind值进行处理
function hb_null(num){
	if(num==null||num==undefined||num=="null"){
		return ""
	}else{
		return num
	}
}
// 动态添加js
var a = location.href
var b = a.split("/")
var c = b.slice(b.length - 1, b.length).toString(String).split(".")
var d = c[0].split("?")
if (d[0] != '') {
	var body = document.getElementsByTagName("body").item(0)
	var script = document.createElement("script")
	script.src = "js/" + d[0] + ".js?v=" + new Date().getTime()
	body.appendChild(script)
}